70% (1995)

77% (1988)

70% (1993)

77% (1988)

76% (1995)

73% (1986)

72% (1983)

63% (1985)

64% (1983)

69% (1989)

63% (1994)

68% (1991)

80% (1991)

64% (1991)

50% (1985)

67% (1992)

56% (1986)

50% (1984)

56% (1993)

53% (1995)